Designation A887 − 89 (Reapproved 2014) Standard Specification for Borated Stainless Steel Plate, Sheet, and Strip for Nuclear Application1 This standard is issued under the fixed designation A887; th[.]
Trang 1Standard Specification for Borated Stainless Steel Plate, Sheet, and Strip for Nuclear
This standard is issued under the fixed designation A887; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1 Scope
1.1 This specification covers chromium-nickel stainless
steel plate, sheet, and strip, modified by the addition of natural
or enriched boron, for nuclear application
1.2 Borated stainless steels covered by this specification,
because of their particular alloy content and specialized
properties, may require special care in their fabrication and
welding Specific procedures are of fundamental importance,
and it is presupposed that all parameters will be in accordance
with approved methods capable of producing the desired
properties in the finished fabrication
1.3 The values stated in inch-pound units are to be regarded
as standard The values given in parentheses are mathematical
conversions to SI units that are provided for information only
and are not considered standard
2 Referenced Documents
2.1 ASTM Standards:2
A370Test Methods and Definitions for Mechanical Testing
of Steel Products
A480/A480MSpecification for General Requirements for
Flat-Rolled Stainless and Heat-Resisting Steel Plate,
Sheet, and Strip
A751Test Methods, Practices, and Terminology for
Chemi-cal Analysis of Steel Products
3 Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 plate—material3⁄16in (4.8 mm) and over in thickness
and over 10 in (250 mm) in width
3.1.2 sheet—material under 3⁄16 in (5.0 mm) in thickness
and 24 in (600 mm) and over in width
3.1.3 strip—material under3⁄16in (5.0 mm) in thickness and under 24 in (600 mm) in width
4 Ordering Information
4.1 Orders for material under this specification shall include the information specified in the Ordering Information section
of SpecificationA480/A480M
5 Process
5.1 If a specific type of melting is required by the purchaser,
it shall be stated on the purchase order
5.2 When specified on the purchase order, or when a specific type of melting has been specified on the purchase order, the material manufacturer shall indicate on the test report the type of melting used to produce the material
6 Heat Treatment
6.1 The austenitic chromium-nickel steels shall be solution-annealed to meet the mechanical property requirements of this specification Solution-annealing shall consist of heating the material to a temperature of 1900°F (1040°C) minimum for an appropriate time followed by water quenching or rapidly cooling by other means
7 Material Test Report
7.1 A report of the results of all tests required by this specification and the type of melting used shall be supplied to the purchaser
8 Chemical Composition
8.1 The chemical analysis of representative material shall be performed, as agreed upon between the purchaser and supplier,
to determine the percentages of the elements identified inTable
1 The chemical composition thus determined shall be reported
to the purchaser, or his representative, and shall conform to the requirements specified inTable 1
8.2 When a product (check or verification) analysis is performed, the chemical composition thus determined may vary from the specified limits by the amounts shown in Table
1, Product Analysis Tolerances, of SpecificationA480/A480M
1 This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.17 on Flat-Rolled and Wrought Stainless Steel.
Current edition approved March 1, 2014 Published April 2014 Originally
approved in 1988 Last previous edition approved in 2009 as A887 – 89 (2009).
DOI: 10.1520/A0887-89R14.
2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 United States
Trang 28.3 Methods and practices relating to chemical analysis
required by this specification shall be in accordance with Test
Methods, Practices, and Terminology A751
8.4 Boron determination not covered in Test Methods,
Practices, and TerminologyA751shall be made as agreed upon
between the purchaser and the supplier
9 Mechanical Properties
9.1 Tensile Properties—The material shall conform to the
tensile property requirements specified inTable 2
9.2 Hardness—The material shall conform to the hardness
requirements as specified in Table 2
9.3 Grade—The grade of the material is defined by the
uniformity of the dispersion of the boron within the melt
Grade A corresponds to the near-optimal dispersion, while
Grade B corresponds to a less-than-optimal dispersion of the
boron Conventional wrought metallurgical practice conforms
to Grade B properties The quality of the boron dispersion is
measured indirectly through the ductility requirements, as
specified inTable 2
10 Special Tests
10.1 If any special tests are required that are pertinent to the
intended application of the material ordered, they shall be
agreed upon between the supplier and the purchaser
10.2 Charpy V-notch impact testing is not required unless it
is specified on the purchase order If so specified, impact testing shall be performed in accordance with Test Methods and DefinitionsA370 The impact test results thus determined shall be reported to the purchaser, or his representative, and shall conform to the requirements specified in Table 3 If subsize impact test specimens are used, the applicable require-ments shall be agreed upon between the purchaser and the supplier
11 Dimensions and Permissible Variations
11.1 Unless otherwise specified in the purchase order, ma-terial shall conform to the permissible tolerances shown in Specification A480/A480M
11.2 Sheet, Strip, and Plate—Material with No 1 finish may
be ground to remove surface imperfections, provided such grinding does not reduce the thickness or width at any point beyond the permissible variations in dimensions
12 Workmanship, Finish, and Appearance
12.1 The material shall be uniform quality consistent with good manufacturing and inspection practices The steel shall have no imperfections of a nature or degree, for the type and quality ordered, that will adversely affect the stamping, forming, machining, or fabrication of finished parts
TABLE 1 Chemical Requirements CompositionA
UNS
Designation
ElementsB
A
Maximum, unless range or minimum is indicated.
BCobalt concentration shall be limited to 0.2 max, unless a lower concentration is agreed upon between the purchaser and the supplier.
TABLE 2 Mechanical Test Requirements
UNS
Designation
in or 50 mm, min, %
Hardness, max
Trang 313 General Requirements for Delivery
13.1 Material furnished under this specification shall
con-form to the applicable requirements of the current edition of
Specification A480/A480M In case of conflict, the
require-ments of this specification shall prevail
14 Number of Tests
14.1 In the case of sheet or strip produced in coil form, two
or more hardness tests (one from each end of the coil); one
impact test, when required; and one or more tension tests shall
be made on specimens taken from each coil If the hardness
difference between the two ends of the coil exceeds 5 HRB, or
equivalent, tensile properties must be determined on both ends
14.2 In the case of sheet, strip, or plate produced in cut
lengths, one tension test; one impact test, when required; and
one or more hardness tests shall be made on each 100 or less
pieces of the same heat and nominal thickness rolled separately
or continuously and heat treated within the same operating
period, either as a lot or continuously
N OTE 1—The term “continuously,” as applied to heat treatment, is
meant to describe a heat-treating operation in which one cut length follows
another through the furnace Interspersement of different melts is
permis-sible if they are of approximately the same nominal thickness and are heat
treated in the same operating period and under the same conditions (time
and temperature), provided that each heat is tested.
15 Specimen Preparation
15.1 Tension-test specimens shall be taken from finished
material and shall be selected either in the longitudinal or
transverse direction The tension-test specimen shall conform
to the appropriate Sections, (Plate-Type Specimen, Sheet-Type
Specimen, and Round Specimens) of Test Methods and
Defi-nitionsA370
N OTE 2—For plate material up to and including 3 ⁄ 4 in (19.05 mm) thick,
the sheet-type tension specimen described in the Sheet-Type Specimen
section (Figure relating to rectangular tension test specimens), of Test
Methods and Definitions A370 is also permitted.
15.2 Notched-bar impact test specimens shall be taken from
finished material Full-size (10 by 10 mm) Type A specimens
shall be used when the material thickness permits When the
material thickness is insufficient to obtain full-size specimens, subsize specimens shall be used The subsize specimens may have a width of full material thickness or may be reduced in thickness to provide the largest possible standard subsize specimen listed in Test Methods and DefinitionsA370 Alter-native specimens may be used, in place of the subsize specimens, as agreed upon between the purchaser and the supplier
15.3 Hardness tests may be made on the grip ends of the tensions test specimens before they are subjected to the tension test
16 Test Methods
16.1 The properties enumerated in this specification shall be determined in accordance with methods as specified in Speci-ficationA480/A480M
16.2 Retests may be made in accordance with the provisions
of the section on General Precautions of Test Methods and DefinitionsA370
17 Retreatment
17.1 If any specimens selected to represent any heat fail to meet any of the test requirements, the material represented by such specimens may be reheat-treated and resubmitted for test
18 Inspection
18.1 In addition to inspection performed by the supplier, inspection of the material by the purchaser’s representative at the producing plant shall be made as agreed upon between the purchaser and supplier as part of the purchase order
19 Rejection and Rehearing
19.1 Samples tested by the purchaser in accordance with this specification that represent rejected material shall be retained for 3 weeks from the date of the notification to the seller of the rejection In case of dissatisfaction with the results
of the tests, the seller may make claim for a rehearing within that time
20 Certification
20.1 The producer’s certification that the material was manufactured and tested in accordance with this specification, together with the report of the test results, shall be furnished at the time of shipment
21 Product Marking
21.1 Each sheet, strip, or plate shall be marked on one face,
in the locations indicated below with the designation number and its suffix, type, test identification number, and the name or mark of the manufacturer The characters shall be of such size
as to be clearly legible The marking shall be sufficiently stable
to withstand normal handling Unless otherwise specified by the purchaser, the marking, at the producer’s option, may be
done with: (1) marking fluid (if a specific maximum impurity
limit of designated elements in the marking fluid is required by
the purchaser, it shall be so stated on the purchase order), (2)
TABLE 3 Impact Test Requirements
ft-lb (J), min
Trang 4low-stress continuous or low-stress
blunt-nosed-interrupted-dot die stamp, (3), a vibratory tool with a minimum
tip radius of 0.005 in (0.1 mm), or (4) electrochemical etching.
21.1.1 Flat sheet, strip in cut lengths, and plate shall be
marked in two places near the ends
21.1.2 Sheet and strip in coils shall be marked near the
outside end of the coil The inside of the coil shall also be
marked or shall have a tag or label attached and marked with
the information of 21.1
21.1.3 Material less than1⁄4in (6.4 mm) in thickness shall not be marked with die stamps
21.2 The manufacturer’s test identification number shall be legibly stamped on each test specimen, if to be shipped to the customer
21.3 Marking for identification for U.S Government pro-curement shall be in accordance with Specification A480/
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